The effectiveness of the standards is enhanced by financial incentives—such as progressive taxes levied on the vehicle weight and engine displacement. Early compliance of this sort is rewarded through tax breaks for vehicles exceeding their targets ahead of schedule.
In addition to the tax-break program, Japan also has a subsidy program. In its fiscal year 2016 the budget will be ¥15 billion for the subsidy program, down from ¥20 billion in fiscal year 2015. Currently, subsidies for clean diesel vehicles stand at up to ¥160,000 per unit.